1 Installing the latest software for your telephone

2 Disabling HD telephony on your ISDN line

The following steps are only necessary if you are using the FRITZ!Box on an ISDN line and you cannot understand the other party when they speak (very distorted, extremely noisy, robotic voice, or static and crackling can be heard).

Enter #962*2* on your telephone and press the call key (lift the receiver).

Setting up a prioritization rule for Internet telephony

Check under "Real-time Applications" whether a rule for "Internet telephony" is present.

If there is no rule for Internet telephony, click "New Rule".

Select "All devices" (default) as the network device from the corresponding drop-down list.

Select the entry "Internet telephony" from the drop-down list "Enter the network application:".

Click "OK" to save the settings.

Configuring other applications

Applications such as file sharing software and online games establish many simultaneous Internet connections. Although the "Traffic Shaping" function of the FRITZ!Box ensures that voice data is prioritized and evenly transmitted, for technical reasons it can only compensate for disturbances caused by these applications to a certain extent:

Decrease the number of simultaneous connections that are allowed.

Reduce the maximum throughput available to the application.

If you still experience disturbances when conducting calls over the Internet:

Configure the application as a background application in the FRITZ!Box.

The FRITZ!Box's echo compensation and traffic shaping functions guarantee high speech quality. However, if you still experience an echo, delays or short dropouts, these are caused by the telephone being used, your Internet service provider or telephony provider, and cannot be influenced by the FRITZ!Box.